TY  - RPRT
TI  - Age determination of zircon crystals from Ceylon
AU  - David Gottfried
AU  - F. E. Senftle
AU  - C. Waring
PY  - 1954
DO  - 10.3133/tei459
UR  - https://pubs.usgs.gov/publication/tei459
ID  - tei459
ER  -